One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,11)(4,10)(5,9)(6,8)(7,13)(12,16)(14,15)(18,23)(19,26)(20,29)(21,25)(27,28)(31,32) involution — undirected(1,3)(2,7)(4,12)(5,13)(6,14)(8,16)(9,11)(10,15)(17,18,21,23,22,20,25,29)(19,24,27,31,28,30,26,32)(2,8)(4,6)(7,15)(9,10)(11,16)(12,14)(17,19)(18,24)(20,30)(21,27)(22,28)(23,31)(25,26)(29,32) involution — undirected(1,4,5,6)(2,8,9,10)(3,12,13,14)(7,16,11,15)(17,20,21,29,22,18,25,23)(19,24,27,31,28,30,26,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.